public IActionResult DeleteDocument(int schoolId, int courseId, int documentId)
{
if (!ModelState.IsValid)
{
return(BadRequest(ModelState));
}
Document document = _schoolRepository.GetDocument(documentId, schoolId, courseId);
if (document == null)
{
return(NotFound());
}
_schoolRepository.DeleteDocument(document, schoolId, courseId);
return(NoContent());
}